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BCECE Engineering BCECE Engineering Solved Paper-2012

  • question_answer
    The size of isoelectronic species ;\[{{\text{F}}^{-}},Ne,N{{a}^{+}}\] is affected by

    A)  nuclear charge (Z)

    B)  valence principal quantum number (n)

    C)  electron-electron interaction in the outer orbitals

    D)  None of the factors because their size is the same

    Correct Answer: A

    Solution :

    The size of isoelectronic species \[{{F}^{-}},\]Ne and \[N{{a}^{+}}\]affected by nuclear charge \[({{Z}_{eff}}).\] With increase in nuclear charge (atomic number), the size of the isoelectronic species decreases.


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